Stall inception phenomena in a single-stage axial-flow pump

被引:37
作者
Goltz, I
Kosyna, G
Stark, U
Saathoff, H
Bross, S
机构
[1] Tech Univ Braunschweig, Pfleiderer Inst Stromungsmaschinen, D-38106 Braunschweig, Germany
[2] Tech Univ Braunschweig, Inst Stromungsmech, D-3300 Braunschweig, Germany
[3] KSB AG Frankenthal, Frankenthal, Germany
关键词
axial-flow pump; stall inception; tip clearance vortex; cross-passage vortex;
D O I
10.1243/095765003322315531
中图分类号
O414.1 [热力学];
学科分类号
摘要
The paper describes an experimental investigation on stall inception phenomena in a single-stage axial-flow pump, utilizing an oil flow technique and two different photo techniques. Moreover, the unsteady casing wall pressure was measured. Representative results are shown and discussed: the pump characteristic for two different NPSH values, selected oil flow pictures of the casing wall and the rotor blades, the wall pressure distribution at design, selected pictures of the cavitating core of the tip clearance vortex at stable and unstable operating conditions and the visualization of a cross-passage vortex as a deep stall phenomenon. These results allow a number of key features of the stall inception process to be identified and to be followed along the unstable part of the pump characteristic.
引用
收藏
页码:471 / 479
页数:9
相关论文
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